A brief press of the button is sufficient to start the car, provided the brake pedal is depressed. I presume that is not your concern, but it is worth noting nonetheless. Is the parking brake configured to disengage automatically upon gear selection, or must it be disengaged manually? My device does this function automatically, although my previous generation had the option for either automatic or manual operation; I presume the second generation is similar. I am merely sharing some considerations; I hope it is a swift resolution once your return to the dealer.